Quant Developer

After applying, I quickly got a Hackerrank OA with 3 roughly Leetcode Medium level problems. My solutions passed all the provided test cases and a few days later I got another OA: 15 minutes - 3 quant probability-type questions, 5 minutes each, where I had to explain my thought process for each question. About a month later I got invited to do a live coding interview over Zoom. The actual question asked was easy but then the interviewer added variations to the question, was able to answer everything except a question about a very esoteric data structure I hadn't heard about, which is what seems to have gotten me dinged. If I had passed that interview, the final step in the process would have been a superday.